HR/9 rate is up slightly at 1.44, versus 1.19 and 1.18 the previous 2 seasons. Also HR/FB % is up to 12.7 from 8.7 and 9.9 the past two seasons. So he is not getting torched by the long ball like Tanaka.
I think his approach of focusing on the 4SFB and CH is getting too predictable, and they are on his stuff and making solid contact too often. He needs to use all his pitches more often.
One thing for sure is the Rays REALLY have him figured out, as all 3 times he has faced them so far this season have been disasters (5.0 ip, 5 ER; 6.0 ip, 5 ER; 3.1 ip, 6 ER)